Microsoft releases Windows 10 19H1 Build 18214

As well as releasing a Redstone 5 build today Microsoft have also released a 19H1 build of Windows 10. 19H1 is the code named for next year’s release of Windows 10. It doesn’t contain many new features but there are some fixes, as well as some known issues.

There is a new feature around HTTP/2 browsing:

Windows 10 Microsoft Edge clients will take advantage of connection coalescing for HTTP/2 as supported in Windows Server 2019

Improved security on Microsoft Edge browsers by guaranteeing HTTP/2 preferred cipher suites

Improved performance on Windows 10 thanks to Cubic, the new default TCP congestion provider

Here are the other features (via) and lookout for my hands on video soon:

General changes, improvements, and fixes for PC

We fixed the issue resulting in the Clock & Calendar flyout sometimes not appearing until you clicked Start or the Action Center. This same issue impacted both notifications and the taskbar jump lists appearing. Thank you to all the Windows Insiders who gave feedback on this issue.

We fixed an issue that could result in an unexpected sihost.exe error when entering Safe Mode.

We fixed an issue where Timeline’s scrollbar didn’t work with touch.

We fixed an issue where when naming a tile folder in Start it would commit as soon as you pressed space.

As some keen eye’d Insiders noticed, we’ve been working on our scaling logic and you should find apps resize better now after monitor DPI changes. As always, we appreciate feedback in this space, so let us know if you have any issues.

We fixed an issue where the enabled/disabled state of Fast Startup would be reset to default after upgrading. After upgrading off of this build your preferred state will persist.

We fixed an issue where the Windows Security icon in the taskbar systray would become a little bit blurrier every time there was a resolution change.

We fixed an issue where the USERNAME environment variable was returning SYSTEM when queried from an un-elevated Command Prompt in recent builds.

We’ve updated the messaging in Snipping Tool to more closely align with the commitment we made here. You’ll also notice in the message that we’re exploring renaming our updated snipping experience – bringing together the old and new. The app update with this change hasn’t flighted yet, but if you have any feedback on the subject we’re open to hearing it.

Known issues

The dark theme File Explorer payload mentioned here is on its way to Skip Ahead, but not yet there. You may see some unexpectedly light colors in these surfaces when in dark mode and/or dark on dark text.

When you upgrade to this build you’ll find that the taskbar flyouts (network, volume, etc) no longer have an acrylic background.

When you use the Ease of Access Make Text bigger setting, you might see text clipping issues, or find that text is not increasing in size everywhere.

When you set up Microsoft Edge as your kiosk app and configure the start/new tab page URL from assigned access Settings, Microsoft Edge may not get launched with the configured URL. The fix for this issue should be included in the next flight.

You may see the notification count icon overlapping with the extension icon in the Microsoft Edge toolbar when an extension has unread notifications.

On Windows 10 in S Mode, launching Office in the Store may fail to launch with an error about a .dll not being designed to run on Windows. The error message is that a .dll “is either not designed to run on Windows or it contains an error. Try installing the program again…” Some people have been able to work around this by uninstalling and reinstalling Office from the Store. If that doesn’t work, you can try to install a version of Office not from the Store.

When the Narrator Quickstart launches, Scan Mode may not reliably be on by default. We recommend going through the Quickstart with Scan Mode on. To verify that Scan Mode is on, press Caps Lock + Space.

When using Narrator Scan mode you may experience multiple stops for a single control. An example of this is if you have an image that is also a link. This is something we are actively working on.

If the Narrator key is set to just Insert and you attempt to send a Narrator command from a braille display then these commands will not function. As long as the Caps Lock key is a part of the Narrator key mapping then braille functionality will work as designed.

There is a known issue in Narrator’s automatic dialog reading where the title of the dialog is being spoken more than once.

When using Narrator Scan mode Shift + Selection commands in Edge, the text does not get selected properly.

Narrator sometimes does not read combo boxes until Alt + down arrow is pressed.

For more information about Narrator new keyboard layout and other known issues, please refer to Intro to New Narrator Keyboard Layout doc (ms/RS5NarratorKeyboard).

We’re investigating a potential increase in Start reliability and performance issues in this build.